Door-operating mechanism



April 7, 1925.

1 1,532,171 P. BURMEISTER DOOR OPERATING HBFHANISM Filed Junl .2;

ATTORNEY April 7, 1925. 1,532,171

P. BURHEISTER noon orzmvrme uzcumusn x H I 7 77 W FnecL-Luy 23. 192;

INVENTOR ATTORNEY April 7, 1925. 1,532,171

P. BURMEISTER DOOR OPERATING IIOIMIISI F1104 Jim-'23. 1m 5 SIMON-Sheet 5 April 7, 1925.

P. BURMEISTER DOOR OPERATING IIGIMIISI .Filqd Jul. 192:

5 Shoots-Sheet 4 face 23017276652297" INVENTOR BY W WITNESS:

ATTORNEY April 7,1925. 1,532,171

P. BURMEISTER DOOR OPERATING IEOIIANISII Filed Jim. 23. 1923 5 Sheets-Sheet 5 INVENTOR v v BY W WITNESS:

A TORN EY Improvements in nism, of which the following is a spec1fi-.

- Fulda,

a nature that upon the actua which ram; nununxsmn, or am I runm', nmimsors, oneness wrsrmn cam-mm. r0 seam PATENT OFFICE.

11..11), OI FULDA, MINNESOTA.

noon ornm rme mom. Application filed June as, was, sum Ho. armies;

To. all whom it may concern:

Be it known that I, Pam. Bnmmisrsn, a citizen of the United States,'residing near Minnesota, have invented new and useful Door-Operating Mechacation.

This invention relates to doors for ga rages, warehouses and the like, and has for its object the provision of a door construction, mounting and operating means of such at either side of the door, by passage of a vehicle thereover, will cause the door to be automatically opened or closed as thecase may be without it being necessary for the driver to alight.

b n im ortant and more specific object is the provision of a door construction and mechanism of this character in which the door is slidably mounted and moved to open or closed position by a motor'having a reversing switch operated by movement of the treadles located in the roadway.

other object is the provision of a mechanism of this character in which the motor will be automatically cut oil when the door reaches its entirely open or entirely closed osition.

Anot er object is the provision of a dc vice of thisicharacter which is equipped with a control lever whereby the motor means may beset iii-operation manually at the door, and which is equipped with other control means operable from a remote point such as'from the office, or the like. An additional object is the provision ofa mechanism of this character which will be comparatively simple and inexpensive in manufacture and Installation, highly ellicient in use, durable in service, a great time and labor saver and a general improvement in-the art.

With the above and other objects and advantages 'in view the invention consists in T1 the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings in Figured is a sectional view through one wall and the. floor of a buildin loolnngtoward the inside of a slidably mounted door and show m o crating means associated thtmm f y p in the county of Nobles and State of be on of a treadle at 20, The shaft Figure 2 is a horizontal section through a portion ofthe building showing a plan view ing taken on the me 2--2 of Fi e 1, Figure 3 is a detail section on thg line H of Fi re Ih'gure is a detail section on the line of Figure 8 Figure {iis an enlarged detail plan view of a portion' of the operating mechanism showing the connection of the treadle operatlng slaft with the motor control bar,

Fi%ure 6 1s a similar view of a shght 1110(11 cation,

Figure 7 is a fragmentar. elevation look-' ing toward the door and s owing the posit on of the parts when the door-is at one limit of its movement, Figure 8 is a' similar view showing the position of the parts when the door is at the other limit of. its movement,

Figure 9.is a detail vers i'ng switch, V Figure 10 is a sectiontherethrough on the line 1010 of Fi ure 9, F1gure 11 is a data elevation of the base of the switch,

Figure 12 it eng cul 1 e c more parti ar y to the drawthe letter A. re resents the door-way of a garage or other uilding and B represepts the door which is shown as rovided with hangers G carrying wheels I? rollingupon a track E. In carrying out the rescut invention I rovido a sprocket 15 Journulod at one she of and abovethe door openm its mounting-being within or upon a; suite is bracket. andabove the door opening I a shaft 16 mounted 'in suitable brackets and carryin which'is trained a elevation of the re is a diagram of the electric 1 upper stretch trained about idlers 19. suitably mounted on the wall of the building.

is lower stretch of the chain is secured to the upper portion of the dooras indicated 16 also carries a pulley 21 about which is traineda belt 22 an im; about a pulley 23 mounted one she carrying a gear 24 meshing with a pinion 25 on the shaft of an electric motor 26 of'the re versible e.

Mounta )1 the wall near the sifas door is or he unio whwh of the door operating mechanism, this view sssreuoa or nun-mas re 7 At the other side of o a base 29 and movable ,by wires 34 and with the armature windmg as 'ndicated in the dia ram. Located within the casin .or shell 18 a stationary disk 37 of insulating material carrying metallic arms 38 and 39 which have their ends extending to the periphery of the disk and terminatin" in contact shoes. These members 38 and 39 have connected therewith the line wires and 41 of the current in the building.

The motor is illustrated as being of the series wound type and itis well known that in such Y a motor to effect reversal thereof, it is merely necessar to reverse .the direction of the current ow through either the field coil or the armature. In the action of this switch it will be'seen that when the case or shell 28 is turned so that the arm 38 2 touches the contacts with which 'the wires 33 and 34 are connected, the arm'3 9 touching the contacts with which the wires 35 and 36 are connected, current will flow from the source, throu h the wire 40, arm 38,

wire 33, field winding of the motor, through the wire 36, through the arm 39 and wire 41 back to the source. At the same time current flows from the source through the wire 40, arm 38, wire 34, armature coils, wire 35, arm 39 and wire 41 back to the source. The motor will then be operated in one direction. When the shell 28 is turned so that the arm 38 engages the contacts to which the wires 33 and 35 are connected, and the arms 39 engages the contacts to which the wires 34 and 36 are con nected, current will flow from the source,

through the wire 40, arm 38, wire 33, through the field, wire 36, arm 39, and wire 41 back to the source; At the same time current will flow from the source throu h the wire 40, arm 38, wire 35, through tie armature wire 34, arm 39 and wire 41 back to the source. In this second instance the current flow through the field is in the same direction as in the first instance, butthe flow through the armature is reversed so that the direction of rotation of the armature will be reversed.

The operating means consists of shafts 43 journaled in the roadway or drive way at both sides of the door and extending into gear housings 44 which may be buried or embedded in the author concrete, depending upon the construction of the approaches khe \Uithin they hou m g, the

This casing is hollowshafts 43 carry bevel gears 45 which mesh with other bevel gears 46 on the ends of shafts a! which extend transversely of the drive way and which carry treadles 48 adapted to be engaged by the wheels of vehicles. The inner ends of the shafts 43 are ,encircled by coil sprin s 49 secured at one end to the shafts as s mum at 50 and having their other ends 51 engaging the arms 520i. a forked lever 53 pivoted on the shafts 43.

Arran ed at one side of the door-way is a vertica ly extending longitudinally slidable rod 54 which has its lower end pivotally connected at 55 with the lever 53 and which has its intermediate portion earryin or formed with stops 56 located above and below a longitudinally shiftable spring pressed pawl plate 57 havin an opening which the rod an ar 54 1s slid-- 58 throulg able. T is plate is slidable on brackets 59 fixed to the wall and is guided in its movement by pins 60 passing through slots 61 in the plate. The sprin for urging the plate in one direction is in icated by t e numeral 62. Between the stops 56 and the bar 54 is formed with three notches 63, 64 and 65 selectively engagable by a tooth 66 at one ed e of the open 58 (Figure 4).

it its u er en the bar 54 terminates in a slotte liead 67 (Figure 7) within the slot of which is engaged a pin 68 carried by one arm of an an 1e lever 69 pivoted on the door frame and including a second u standing arm 70 somewhat overlying til chain 18. Pivotally connected with the angle lever is a link 71 which is connected with an operating arm 72 on the switch casing 28. Mounted on the chain at suitably spaced points thereon are stops 73 and 74 ada ted to enga the an le lever 69 when t 1e door reac cs its f 1y open or closed position and for the purpose of returning the switch to its neutral position.

For effecting manual control I provide an elongated lever 75 which is ivoted within a suitable bracket 7 6 mounte on the wall and which is pivotally connected at 77 with the rod 54.

For effecting control from a remote oint I rovide a cable 78 trained over suitable pulleys 79 and 80 and having its ends connected with o posite sides of the lever arm 70. his cable should extend to the oifice of the building or any other desired headquarters so that the mechanism ma be operated irrespective of the treadles an manual control lever.

In the operation it will be seen that if the door is shut and a vehicle drives over the treadle 48 on the approach side the shaft angle 47 of the depressed treadle will operate to lac .lsth

arms 38' and 39 of -'door-wa lever 53 will be moved downwardly whereupon the bar 54 will be moved downwardly until the up ermost stop 56 engages the pawl plate 5 Thesprings 49 operate to prevent undue movement in any res t so that injury to the mechanism will prevented. It should be stated that when the door is closed the motor -is idle and the reversing switch is in its neutral or circuit rea plflilte bein engaged within the notch fieL I on the ar 54 is moved downwardly, as above described, it results in rocking the angle lever 69 whereupon the link 71 turns e switch casin .28 and brings two of the contacts thereo in engagement with the the stationary disk. Current then flows through the motor and the rotation of the motor is imparted through the gearing and belting to the shaft 16 so that the sprocket 17 thereon will be driven. The .result will be that the driving of the chain 18 will move the door to its open position. When the door is thus opened, the stop 73 will engage against the an le lever arm 70 and effect rocking thereof w rich will lift the bar 54 to its normal or neutral position and at the same time turn the switch casing 28 to its circuit breaking position.

When the vehicle has passed through the 48 theafts 43 will be rotated in the same manner but in the 0 posite direction and the bar 54 will be moved upwardly for throwing the switch in its other position so that current will be supplied to the armature of the motor in a reverse direction.

that the chain will operate to return the door to normal or closed position. When the door reaches its closed position the stop 74 will engage the angle lever arm 70 and return the switch to its out off position.

It is obvious that the bar 54 may be shifted in one direction or the other by means of the hand lever 75 and it is equally true that the same result may be obtained by pulling properly upon the cable 78.

In order that looking ma be effected it is preferable to provide a hoo c 81 on the door frame enga cable with a pin 82 or the like on the ban lever and when this is done it is quite obvious that the bar 54 can not be moved untilthe hook is disengaged. "At such a time it is apparent that depression of a treadle will have no effect whatever on the mechanism inasmuch as the springs 49 will simply yield with the bar 54 remaining inactive.

In some instances it is not necessary to have a tradle at each side of the door and in Figure 6 I have disclosed this modification in which the constructionand operation are entitrely the same except that I provide only one shaft 43 which has the same type g position, the tooth 66 on the pawl b a the device factorily erforin all of its- While I and drives over. the other treadles moving said rod. The motor is 4 thus reversed and the sprocket 17 driven so of spring connection 49 with the; forked lever 53 which connects with the bar 54.

From the foregoing description and a study of the drawings it will be .a that I have thus provided a. simp y constructed and consequently ine 8118117841001 operatmg mechanism which Jvi be. entirely automatic or which may be manually controlled if preferred. The device is bound to e a great time and labor saver especially when used in. connection with garages where the doors must be closed and opened often. Owin to the simplicity of the construction and t e fewness of theparts it is apparent that there is little to get out of order so that should have a lon functions. 4 have shown and described the pre--- ferred embodiment of the invention it is of course to be understood that I reserve the right to make such changes in'the form,.construction and arrangemept of arts as will not depart from the spirit of t e invention or the scope of the sub oin'edclaims.

Having thus described my invention I claim:

1. Operating mechanism for a slidably mounted door, comprising a chain trained about sprockets and connected with the door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a, lon 'tudinally movable rod located at one si e of the door-way and connected withthe switch, and treadle operated means at both sides of the door-way for 2. Operating mechanism for a slidably mounted door, comprising a chain trained about sprockets and connected. with the door, a-lmotor having with one sprocket, a reversingswitch for the motor, a longitudinally movable rod located at oneside of the door-way and connected; with the switch, treadle' operated means at both sides of the doorway for moving said rod, and a yieldable connection between the treadleo iting means and the rod to dpermit the atter to remain stationary an 3. Operating mechanism for a slidab y mounted door, comprising a chain trained .about sprockets connected withv the door, a .motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinally movable rod located at one side of the door-way and connected with the switch, treadle operated means at both sides of the door-way for moving said rod, and a pivoted lever operatively connected with said rod whereby to effect movement thereof and control of the motor manually.

4. Operating mechanism for a slidably mounted door, comprising a chain trained about sprockets and connected with the parent life and satisa drive connection the former to move inactivel i for moving t door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinal! movable rod located at one side of the nected with the switch, and treadle operated means at both sides of the door-way for moving said rod, an angle lever pivotally mounted and having one arm connected with said 'rod, and stops carried by the chain and en ageable with said angle lever die switch to neutral position when the door reaches either limit of its movement.

5; Means for operatinglziashdably mounted door consisting of sproc ets mounted above the door opening, a chain trained about said sprockets and connected with the door, a motor having a drive connection with one sprocket, a reversing switch for the motor consisting of a rotatable shell member of insulating material having a central circular opening, contacts extending within the open ing and connected with the terminals of the field and armature rwindings of the motor, a stationary disk mounted within the opening and carrying contact members connected with a source of current and adapted to be brought into engagement with selected airs of said first named contacts, a movab y mounted rod connected with the rotatable shell of said reversing switch, shafts journaled at opposite sides of the door-way and having a yieldable c0nnection with an intermediate shaft connected with said rod and treadles on said shafts.

6. Operating mechanism for a slidably mounted door comprising a chain trained about sprockets and connected with the door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinally movable rod located at one side of the door-way and connected with the switch, treadle operated means in advance of the door-way for moving said rod, means for lockin said rod against movement, and a yieldable operat ing connection between the treadle and the oor-way and condoor, a 'motor having a drive connection.

with one sprocket, a reversing switch for the motor, a longi-tudinall movable rod located at one side of the oer-way and connected with the switch, treadle operated means in advance of the door-way for movin said rod, and means for temporarily holding said rod in either selected position.

8. Operating mechanism for a slidably mounteddoor, comprising a chain trained about sprockets and connected with the door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinally movable rod lo cated at one side .of the door-way and connected with the switch, treadle operated means in advance of the door-way for movin said rod, and means for temporarily ho ding said rod in either selected position. said means including a pawl plate spring pressed into engagement with an edge of the rod, and the rod being formed with notches engaged by said plate.

9. Operating mechanism for a slidably mounted door, comprising a chain trained about sprockets and connected with the door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinally movable rod located at one side of the door-way and connected with the switch, treadle operated means in advance of the door-way for movsaid rod, and means for temporarily ho ding said rod in either selected position, said means including a pawl plate spring pressed into engagement with an edge of the rod the rod being formed with notches engaged by said plate, and stops on the rod above and below the pawl plate for limiting movement of the rod.

In testimony whereof I aiiix my signature.

PAUL BURMEISTE R.

door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinall movable rod located at one side of the oor-way and connected with the switch, and treadle operated means at both sides of the door-way for moving said rod, an angle lever pivotally mounted and having one arm connected with said rod, and stops carried by the chain and en ageable with said angle lever for moving t 0 switch to neutral position when the door reaches either limit of its movement.

5. Means for operatin aslidably mounted door consisting of sproc ets mounted above the door opening, a chain trained about said sprockets and connected with the door, a motor having a drive connection with one sprocket, a reversing switch for the motor consisting of a rotatable shell member of insulating material having a central circular opening, contacts extending within the opening and connected with the terminals of the field and armature windings of the motor, a stationary disk mounted within the opening and carrying contact members connected with a source of current and adapted to be brought into engagement with selected airs of said first named contacts, a movabFy mounted rod connected with the rotatable shell of said reversing switch, shafts journaled at opposite sides of the door-way and having a yieldable connection with an intermediate shaft connected with said rod and treadles on said shafts.

6. Operating mechanism for a slidably mounted door comprising a chain trained about sprockets and connected with the door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinally movable rod lorated at one side of the door-way and connected with the switch, treadle operated means in advance of the door-way for moving said rod, means for locl-tin said rod against movement, and a yieldahle operating connection between the treadle and the Certificate rod for permitting movement of the former door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinal! movable rod located at one side of the oor-way and connected with the switch, treadle operated means in advance of the door-way for movin sa1d rod, and means for temporarily ho ding said rod in either selected position.

8. Operating mechanism for a slidably mounted door, comprising a chain trained about sprockets and connected with the door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinally movable rod located at one side ,of the door-way and connected with the switch, treadle operated means in advance of the door-way for movin said rod, and means for temporarily ho ding said rod in either selected position. said means including a pawl plate spring pressed into engagement with an edge of the rod, and the rod being formed with notches engaged by said plate.

9. Operating mechanism for a slidably mounted door, comprising a chain trained about sprockets and connected with the door, a motor having a drive connection with one sprocket, a reversing switch for the motor, a longitudinally movable rod located at one side of the door-way and con-- nected with the switch, treadle operated means in advance of the door-way for moving said rod, and means for temporarily ho ding said rod in either selected position, said means including a pawl plate spring pressed into engagement with an edge of the rod the rod being formed with notches engaged by said plate, and stops on the rod above and below the pawl plate for limiting movement of the rod.

In testimony whereof I atiix my signature.

PAUL BURMEISTER.

of Correction.

It is hereby certified that Letters Patent No. 1,532,171, "ranted April 7, 1925,

upon the application of Paul Burmeistcr, of near Fulda,

Minnesota, for an improvement in Door-Operating Mechanism, were erroncousl y issued one-half to Charles Vest and one-half to Delmar M. Mead, as assignees, whereas said Letters Patent should have been issued to the inventor, said .lsm-mcister, rmrl (-II(I.I'Z68 W eat and Delmar M. 1]! sad, said West and Mead being assignccs of o'ne-lialf interest only in said inventioni as shown by the records of assignments in this ()tlice; and

that the said Letters atent should be read with this correction therein that the same ma conform to the record of the case in the Patent Ofiice.

Signe and sealed this 2d day of JnnmA. 1925.

[seen] KARL FENNING, Acting Gammz'ssioner of Patents.

Certificate of Correction.

It is hereby certified that Letters laivnt No. 1,532,171, ranted April i". 1925, upon the application of Paul UHIHKiStOI, of mar Fnlihi, Minnesota, for an improvement in Door-Operating M ei'hunism." wore erronvously isqu-(i one-half to Charles Vest and one-half to Dolmor M. Mead. as assignees, win-was said Letters Patent should haw been issued to tho inventor, said Himwn'ixfmg unzl f'lmrles iVest and Del'me'r M. Mead, said \Vest and Mead living assignvus of owe-half intvrest only in saidinvention, as shown by (he rvcords of assignments in this ()Ilivv; and that the said Letters Patent should he road with this correction therein that the same Ina conform to the record of the case in the Patent ()flicc.

Sigma and sealed this 2d day of June, A. 1925.

[SEAL] KARL F EN NING,

Acting Commissioner of Patvnts. 

